Walker is already enrolled after committing to UW in December — here’s the blog post from then with video, links and a scouting report.

At the moment, he projects as the only safety in the class, though some have speculated UW could also use Connor O’Brien — listed as a linebacker — there as well.

UW returns starting strong safety Sean Parker but will need to replace free safety Justin Glenn. Will Shamburger and Brandon Beaver, who moved to that spot during bowl practices, look like the top two on the depth chart there right now, barring other players moving there, which is more than possible.

Walker being available for the spring will obviously give him a leg up in that competition, though it’s way too early to know if he can factor into it seriously in 2013.

King and Kelly are each cornerbacks, a spot where UW loses Desmond Trufant off the 2012 roster but returns basically everyone else who played significantly (namely, Marcus Peters, Greg Ducre and Tre Watson) and also will welcome transfer Travell Dixon and Cleveland Wallace off of redshirt seasons.

Kelly is regarded as one of the gems of UW’s class, decommitting from UCLA and also turning down Oregon to sign with the Huskies. Here’s the blog post from when he committed with links, video and a scouting report.

King committed in August and has held firm — here’s the blog post from when he committed, also with some video, links and a scouting report. And here’s a more recent overview of King from the San Jose Mercury News noting that he also has the size to be a safety, if needed.

With none of the players thought still considering UW listed primarily as defensive backs, this could be it for UW’s secondary haul in this class.